Stomach acid reflux is a location problem, not an acid problem
Your stomach produces hydrochloric acid with a pH of around 1.5–3.5 — strong enough to dissolve meat and kill most bacteria you swallow. That's its job. The stomach protects itself with a thick mucus layer that renews constantly. The esophagus has no such protection.
So "stomach acid reflux" isn't about having the wrong acid. It's about perfectly normal acid getting past the lower esophageal sphincter (LES) — the muscular valve at the top of the stomach — and landing on tissue that can't cope with it. The basics of acid reflux →
What makes the valve let acid through?
A stomach stretched by a large or fast meal, swallowed air, or carbonated drinks pushes acid up against the valve until it yields.
Fat, chocolate, mint, coffee, alcohol, nicotine and some medicines chemically loosen the LES.
Lying flat within 2–3 hours of eating lets acid pool right at the valve and seep through.
Hiatal hernia, abdominal weight and pregnancy all undermine the muscular support the valve relies on.
All nine causes of acid reflux, explained →
Too much stomach acid — or too little?
Most people with reflux make a normal amount of acid. Acid-reducing medicines don't work because you have "too much"; they work by making whatever refluxes less irritating while the esophagus heals. How the medicines compare →
You'll also read online that reflux is caused by low stomach acid and that you should take acid supplements. The evidence for this is weak. Low acid can cause bloating and poor digestion — and any bloating raises pressure — but reflux symptoms are caused by acid and bile touching the esophagus, not by a shortage of acid. Be careful with anyone selling you the opposite.
My experience: I assumed my stomach was "too acidic" and just treated the burn. In reality my stomach was fine — I was stretching it with five-minute meals every single day, and the valve gave up. Years of that left a severe mucosal break where the esophagus meets the stomach. Read the full story →
How to keep stomach acid where it belongs
- Reduce pressure: smaller meals, eaten slowly, chewed properly; skip fizzy drinks; don't gulp.
- Keep the valve tight: limit fat, chocolate, mint, coffee, alcohol; quit smoking.
- Use gravity: stay upright 3 hours after eating; raise the head of the bed 15–20 cm.
- Remove outside pressure: loose waistbands, lose excess abdominal weight.
- Heal while you change habits: a short course of acid-reducing medicine if your doctor recommends it.
See a doctor if reflux happens twice a week or more, swallowing is difficult or painful, you're losing weight, or you notice vomiting or black stools. That pattern is GERD and needs a diagnosis, not guesswork.
What to do next
Most stomach acid reflux calms down once the pressure does. Here's the full treatment plan → — and if eating slowly is the part you can't make stick, that's what the FixMyStomach app was built to train.
This page shares personal experience and general information. It is not medical advice — please consult your doctor about your own condition.